From bb5f9a5ab768452de9e166dc28d0ffc234245ef1 Mon Sep 17 00:00:00 2001
From: Dmitriy Mozgovoy <robotshara@gmail.com>
Date: Tue, 7 May 2024 21:26:46 +0300
Subject: [PATCH] fix(fetch): treat fetch-related TypeError as an
 AxiosError.ERR_NETWORK error; (#6380)

---
 lib/adapters/fetch.js       | 13 ++++++++-----
 test/unit/adapters/fetch.js | 10 ++++++++++
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/lib/adapters/fetch.js b/lib/adapters/fetch.js
index c569982..a25b717 100644
--- a/lib/adapters/fetch.js
+++ b/lib/adapters/fetch.js
@@ -196,13 +196,16 @@ export default isFetchSupported && (async (config) => {
   } catch (err) {
     onFinish();
 
-    let {code} = err;
-
-    if (err.name === 'NetworkError') {
-      code = AxiosError.ERR_NETWORK;
+    if (err && err.name === 'TypeError' && /fetch/i.test(err.message)) {
+      throw Object.assign(
+        new AxiosError('Network Error', AxiosError.ERR_NETWORK, config, request),
+        {
+          cause: err.cause || err
+        }
+      )
     }
 
-    throw AxiosError.from(err, code, config, request);
+    throw AxiosError.from(err, err && err.code, config, request);
   }
 });
 
diff --git a/test/unit/adapters/fetch.js b/test/unit/adapters/fetch.js
index c47e210..1d8498e 100644
--- a/test/unit/adapters/fetch.js
+++ b/test/unit/adapters/fetch.js
@@ -370,4 +370,14 @@ describe('supports fetch with nodejs', function () {
 
     assert.strictEqual(data, '/?test=1&foo=1&bar=2');
   });
+
+  it('should handle fetch failed error as an AxiosError with ERR_NETWORK code', async () => {
+    try{
+      await fetchAxios('http://notExistsUrl.in.nowhere');
+      assert.fail('should fail');
+    } catch (err) {
+      assert.strictEqual(String(err), 'AxiosError: Network Error');
+      assert.strictEqual(err.cause && err.cause.code, 'ENOTFOUND');
+    }
+  });
 });